EP1503495A3 - Digital feed-forward system - Google Patents

Digital feed-forward system Download PDF

Info

Publication number
EP1503495A3
EP1503495A3 EP04017348A EP04017348A EP1503495A3 EP 1503495 A3 EP1503495 A3 EP 1503495A3 EP 04017348 A EP04017348 A EP 04017348A EP 04017348 A EP04017348 A EP 04017348A EP 1503495 A3 EP1503495 A3 EP 1503495A3
Authority
EP
European Patent Office
Prior art keywords
signal
cancellation
output
error
output signal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP04017348A
Other languages
German (de)
French (fr)
Other versions
EP1503495A2 (en
Inventor
Ian Stuart Robinson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Northrop Grumman Systems Corp
Original Assignee
Northrop Grumman Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Northrop Grumman Corp filed Critical Northrop Grumman Corp
Publication of EP1503495A2 publication Critical patent/EP1503495A2/en
Publication of EP1503495A3 publication Critical patent/EP1503495A3/en
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/32—Modifications of amplifiers to reduce non-linear distortion
    • H03F1/3223—Modifications of amplifiers to reduce non-linear distortion using feed-forward
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/32—Modifications of amplifiers to reduce non-linear distortion
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/32—Modifications of amplifiers to reduce non-linear distortion
    • H03F1/3223—Modifications of amplifiers to reduce non-linear distortion using feed-forward
    • H03F1/3229—Modifications of amplifiers to reduce non-linear distortion using feed-forward using a loop for error extraction and another loop for error subtraction
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2200/00—Indexing scheme relating to amplifiers
    • H03F2200/331—Sigma delta modulation being used in an amplifying circuit

Landscapes

  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Amplifiers (AREA)

Abstract

An amplification system and method is provided that employs a digital cross-cancellation technique which provides a separate digital signal to be input to a separate DAC to generate a cancellation signal. The cancellation signal is added to the output of the amplifier to produce a final signal with substantially reduced distortion and/or out-of-band emissions. The cancellation signal can be pre-computed or derived by generating an inverted version of the wanted signal, and combining it with a portion of the output signal to determine the error or unwanted portion of the output signal. This error signal is then combined with a delayed version of the output signal.
EP04017348A 2003-07-23 2004-07-22 Digital feed-forward system Withdrawn EP1503495A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US625378 2003-07-23
US10/625,378 US7129778B2 (en) 2003-07-23 2003-07-23 Digital cross cancellation system

Publications (2)

Publication Number Publication Date
EP1503495A2 EP1503495A2 (en) 2005-02-02
EP1503495A3 true EP1503495A3 (en) 2006-03-29

Family

ID=33541439

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04017348A Withdrawn EP1503495A3 (en) 2003-07-23 2004-07-22 Digital feed-forward system

Country Status (3)

Country Link
US (1) US7129778B2 (en)
EP (1) EP1503495A3 (en)
JP (1) JP2005045767A (en)

Families Citing this family (38)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1335494A1 (en) * 2001-12-19 2003-08-13 Siemens Aktiengesellschaft Sigma-delta converter with noise suppression
US7577211B2 (en) * 2004-03-01 2009-08-18 Powerwave Technologies, Inc. Digital predistortion system and method for linearizing an RF power amplifier with nonlinear gain characteristics and memory effects
US7593480B2 (en) * 2004-03-10 2009-09-22 Panasonic Corporation Transmission device and radio communication device
JPWO2006025213A1 (en) * 2004-08-30 2008-05-08 松下電器産業株式会社 Peak power suppression device and peak power suppression method
US7330073B2 (en) * 2004-10-06 2008-02-12 Telefonaktiebolaget L M Ericsson (Publ) Arbitrary waveform predistortion table generation
JP4533384B2 (en) * 2005-02-14 2010-09-01 パナソニック株式会社 Transmission modulation device, communication device, and mobile radio
CA2595241C (en) * 2005-02-25 2013-04-23 Telefonaktiebolaget Lm Ericsson (Publ) Non-linear processing of signals
US7295074B2 (en) * 2005-03-31 2007-11-13 Beceem Communications Inc. Doherty power amplifier with phase compensation
KR100756041B1 (en) * 2005-06-27 2007-09-07 삼성전자주식회사 Doherty Amplifier and Transmitter Using Mixer
US7831221B2 (en) * 2005-12-13 2010-11-09 Andrew Llc Predistortion system and amplifier for addressing group delay modulation
US7474237B2 (en) * 2006-02-03 2009-01-06 The Trustees Of Columbia University In The City Of New York Circuits and methods for using error correction in power amplification and signal conversion
JP4753255B2 (en) 2006-09-01 2011-08-24 ソニー・エリクソン・モバイルコミュニケーションズ株式会社 Power amplification device and mobile phone terminal
US20080068074A1 (en) * 2006-09-14 2008-03-20 Leadis Technology, Inc. Efficient Narrow Band Amplification Using Linear Amplifier
US8019015B2 (en) 2007-02-26 2011-09-13 Harris Corporation Linearization of RF power amplifiers using an adaptive subband predistorter
US8005162B2 (en) * 2007-04-20 2011-08-23 Microelectronics Technology, Inc. Dynamic digital pre-distortion system
US7885355B2 (en) 2007-10-15 2011-02-08 Cobham Defense Electronic Corp Multi-dynamic multi-envelope receiver
JP5234006B2 (en) * 2007-11-21 2013-07-10 富士通株式会社 Power amplifier
JP5010542B2 (en) * 2008-03-05 2012-08-29 株式会社東芝 High frequency power amplifier and amplification method
US7642850B2 (en) 2008-04-02 2010-01-05 Harris Corporation Feedforward linearization of RF power amplifiers
US8229029B2 (en) * 2009-01-14 2012-07-24 Harris Corporation Transmitter with reduced spectral regrowth and associated methods
US8514007B1 (en) 2012-01-27 2013-08-20 Freescale Semiconductor, Inc. Adjustable power splitter and corresponding methods and apparatus
US9203348B2 (en) 2012-01-27 2015-12-01 Freescale Semiconductor, Inc. Adjustable power splitters and corresponding methods and apparatus
US20140017318A1 (en) * 2012-07-10 2014-01-16 Kevin O'Connell Method to produce a medicinal product comprising a biologically active protein and the resulting product
US8653890B1 (en) * 2012-10-19 2014-02-18 Freescale Semiconductor, Inc. Amplifier calibration
CN104427512A (en) * 2013-08-22 2015-03-18 中兴通讯股份有限公司 Networking method and device for distributed base station
US9748983B2 (en) 2013-09-30 2017-08-29 Nec Corporation Transmitter and method for transmission control in a technique of delta sigma modulating
US9225291B2 (en) 2013-10-29 2015-12-29 Freescale Semiconductor, Inc. Adaptive adjustment of power splitter
US9774299B2 (en) 2014-09-29 2017-09-26 Nxp Usa, Inc. Modifiable signal adjustment devices for power amplifiers and corresponding methods and apparatus
EP3057279A1 (en) * 2015-02-16 2016-08-17 Universität der Bundeswehr München Device and method for transmitting data
JP2016197782A (en) 2015-04-02 2016-11-24 富士通株式会社 Transmitter and noise removal method
US9647611B1 (en) 2015-10-28 2017-05-09 Nxp Usa, Inc. Reconfigurable power splitters and amplifiers, and corresponding methods
CN106301633B (en) * 2016-07-29 2019-04-26 四川天邑康和通信股份有限公司 A kind of repeater test waveform production method and system
US11108403B2 (en) * 2017-04-13 2021-08-31 Rohde & Schwarz Gmbh & Co. Kg Device and method for efficient digital-analog conversion
CN111247310B (en) * 2017-11-17 2023-09-15 埃克森美孚技术与工程公司 Method and system for performing wireless ultrasound communication along a tubular member
US10128875B1 (en) * 2018-03-30 2018-11-13 Mitsubishi Electric Research Laboratories, Inc. Methods and system of a digital transmitter with reduced quantization noise
WO2019228619A1 (en) 2018-05-30 2019-12-05 Telefonaktiebolaget Lm Ericsson (Publ) An improved doherty amplifier arrangement
US10958279B1 (en) * 2019-09-06 2021-03-23 Qualcomm Incorporated Partitioned digital-to-analog converter system
CN115413009A (en) * 2021-05-28 2022-11-29 华为技术有限公司 Power amplifier nonlinear characteristic parameter determination method and related device

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6188732B1 (en) * 1998-10-19 2001-02-13 Samsung Electronics Co., Ltd. Digital feedforward amplifier for use in an RF transmitter and method of operation
US20020012404A1 (en) * 2000-07-20 2002-01-31 Lg Electronics Inc. Predistortion linearizer and method thereof
US20020048326A1 (en) * 2000-08-29 2002-04-25 Sahlman Karl-Gosta Emanuel Method and apparatus for plurality signal generation
US20020084847A1 (en) * 2000-12-26 2002-07-04 Lg Electronics Inc. Digital linearizer of high power amplifier and digital linearizing method
WO2002103891A2 (en) * 2001-06-15 2002-12-27 Andrew Corporation Control scheme for signal processing arrangement

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5586181A (en) * 1990-09-04 1996-12-17 Tollgrade Communications, Inc. Metallic channel unit network
US5963091A (en) * 1998-04-01 1999-10-05 Chen; Jiunn-Tsair Article comprising a power amplifier with feed forward linearizer using a RLS parameter tracking algorithm
EP1067676B1 (en) 1999-06-30 2009-06-17 Alcatel Lucent Method for linearising a power amplifier over a wide frequency band
JP3877937B2 (en) 2000-05-18 2007-02-07 株式会社エヌ・ティ・ティ・ドコモ Feed forward amplifier
FR2835120B1 (en) * 2002-01-21 2006-10-20 Evolium Sas METHOD AND DEVICE FOR PREPARING SIGNALS TO BE COMPARED TO ESTABLISH PRE-DISTORTION ON THE INPUT OF AN AMPLIFIER
US7015753B2 (en) 2003-06-02 2006-03-21 Edo Communications And Countermeasures Systems Inc. Digital signal processing based implementation of a feed forward amplifier
US6885242B2 (en) * 2003-06-30 2005-04-26 Motorola, Inc. Feedforward linear amplifier

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6188732B1 (en) * 1998-10-19 2001-02-13 Samsung Electronics Co., Ltd. Digital feedforward amplifier for use in an RF transmitter and method of operation
US20020012404A1 (en) * 2000-07-20 2002-01-31 Lg Electronics Inc. Predistortion linearizer and method thereof
US20020048326A1 (en) * 2000-08-29 2002-04-25 Sahlman Karl-Gosta Emanuel Method and apparatus for plurality signal generation
US20020084847A1 (en) * 2000-12-26 2002-07-04 Lg Electronics Inc. Digital linearizer of high power amplifier and digital linearizing method
WO2002103891A2 (en) * 2001-06-15 2002-12-27 Andrew Corporation Control scheme for signal processing arrangement

Also Published As

Publication number Publication date
EP1503495A2 (en) 2005-02-02
US7129778B2 (en) 2006-10-31
JP2005045767A (en) 2005-02-17
US20050017802A1 (en) 2005-01-27

Similar Documents

Publication Publication Date Title
EP1503495A3 (en) Digital feed-forward system
WO2005094537A3 (en) Model based distortion reduction for power amplifiers
US7365664B2 (en) ADC with dynamic range extension
EP1860772A3 (en) Automatic input-gain control circuit and method thereof
DE602005006119D1 (en) Adaptive digital predistortion system
CA2488472A1 (en) Digital memory-based predistortion technique
AU2001264865A1 (en) Real time correction of a digital pwm amplifier
EP1972055A4 (en) Digital pwm amplifier with simulation-based feedback
EP1865598A3 (en) Input-gain control apparatus and method
EP2221965A3 (en) Amplifier employing interleaved signals for PWM ripple suppression
EP2254241A3 (en) Power series digital predistorter and control method therefor
EP1791390A3 (en) Ultra directional speaker system and signal processing method thereof
EP1932308A4 (en) Amplifier system employing analog polynomial predistortion with sub-nyquist digital adaptation
TW200644410A (en) Amplifier and method for switching amplifier
EP2442441A3 (en) Amplification
ATE230173T1 (en) METHOD AND DEVICE FOR LINEARIZING AN AMPLIFIER
WO2006039649A3 (en) Unified analog input front end apparatus and method
ATE325468T1 (en) SIGMA-DELTA MODULATION
AU1519201A (en) Linearisation of an amplifier
WO2007001720A3 (en) Apparatus for removing distortions created by an amplifier
CN104011999B (en) Method and apparatus for exports audio signal
US20040165661A1 (en) Device and method for digital pulse with modulation
TW200607227A (en) Method and apparatus for self-oscillating differential feedback class-d amplifier
AU2003212606A1 (en) A differential amplifier
TW200627790A (en) Power amplifier and method for correcting error of output signals thereof

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL HR LT LV MK

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL HR LT LV MK

17P Request for examination filed

Effective date: 20060508

AKX Designation fees paid

Designated state(s): DE FR NL

17Q First examination report despatched

Effective date: 20090309

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: NORTHROP GRUMMAN SYSTEMS CORPORATION

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20130201